Jesse e



I. E. ASH.

RIVET CUTTING MACHINE.

APPLICATION 511.50 1uNE 91. 1916.

1,195,897. PatentedAug. 22,1916.

XSS fr Suva/Lto@ ame/13 UNITED STATES PATENT oEEIcE.

JESSE E. ASH, OF COVINGTON, KENTUCKY, ASSIGNOR OF ONE-THIRD TO CLAYTON LEMON AND ONE-THIRD TO GEORGE L. GREEN, BOTH F COVINGTON, KENTUCKY.

BNET-CUTTING MAcHINE.

Specication of Letters Patent.

Patented Aug. 22, 1916.

Application filed J une 9, 1916. Serial No. 102,767.

Y zen of the United States, residing at Covington, in the county of Kenton and' State of Kentucky, have invented new and useful Improvements in Rivet-Cutting Machines,

of which the following is a specification.

This invention relates to rivet cutting machines and has particular application'to a fluid operated rivet cutter.

In carrying out the present invention, it

is my purpose to provide a fluid operated rivet cutting machine which will embody in its construction, among other features, an elongated cylinder to one end of which is secured a cup-shaped casting carrying the cutting tool, the Shank of the latter being passed through the casting and projecting into the lower end of the cylinder in the path of movement of a piston that is slidably mounted in the cylinder, and a yieldably supported tool holder mounted in the casting and normally bearing against the adjacent end of the cylinder and encircling the tool shank to take the impact of the piston in the event of the. tool shank slipping out of the lower end'of the cylinder, thereby preventing mutilation of the casting and the cylinder.

It is also my purpose to provide `a rivet cutter whereby the rivets may be cut quickly and which may be handled by two or three men easily and conveniently and controlled by one of the operators.

Vith the above andvother objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In the accompanyingdrawing.; Figure 1 is a vertical sectional view through a rivet cutting machine constructed inaccordance with the present invention. Fig. 2 is a similar view taken at right angles to Fig. 1. Fig. 3 is a cross sectional view through the controlling valve on the line 3 3 of Fig. 1. Fig. 4 is a like view showing the valve in a diiierent position from that illustrated in Fig. 3. Fig. 5 is a similar view showing the valve in cut off position. Fig. 6 is a cross sectional view through the tool end o the cylinder.

Referring now to the drawing in detail, 1

cylinder.

designates an elongated cylinder in which is mounted for reciprocatory movement a pis.- ton 2. Threaded onto one end of the cylinder is a collar 3 formed with a .boss 4 provided with a port`5 opening into the lower end of the cylinder. This collar 3 is also formed, with an outwardly extending flange 6 at the outer end thereof.

7 designates an inverted cup-shaped casting alining axially with the cylinder 1 and formed, ,at the open ,end thereof, with an outwar'dly projecting flange 8 abutting the flange 6 and formed with alining bolt-holes to receive securing bolts 9 whereby the casting may be securely fastened tothe cylinder. The bore in the casting 7 is preferably of greater diameter than the bore of the cylinder and mounted in the casting is a sleevelike tool holder 10 having one 'end formed with a flange 11 that abuts the adjacent end of the cylinder, and the other end projecting through an opening in the end wall of the casting. Surrounding the tool holder is a coiled expansion spring 12 having one eX- tremity engaging the flange on the tool holder and the other end abutting the .end wall of the casting. This spring acts to holdthe flanged end of the tool holder in engagement with the cylinder and permits the tool holder. to move relatively to the Vcylinder and casting in the event of the holder being struck by the piston 2 in the Threaded onto the other end of the cylinder 1 is a casting 13 formed with a valve chamber 14 and a passage 15 estabf lishing communication between the valve chamber l14 and the adjacent end of the' cylinder.

16 designates a pipe line having one cndp, opening into the valve chamber 14 and the other end secured in the port 5.Wherebyv communication may bel established between the valve chamber and the tool end of the cylinder. Leading into the valve chamber 14 is an inletpipe 17 connected with a suit-` able source of supply while leading out ofV the valve 'chamber is an exhaust pipe 18.

- Rotatably mounted in the valve chamber 14 the exhaust pipe 18, as shown in Fig. 3. When the valve is actuated to another position, as illustrated in Fig. f1, communication is established' between @e inlet pipe 17 and the pipe line 16 and between the passage 15 and' the exhaust pipe 18. In the 4cut 06:' position of the valve, shown in Fig. 5, the plug closes the ends of the-pipes 17 and '18, thereby preventing the flowing of air into'the cylinder and the exhausting of air therefrom.

21 designates a cutting tool of any suitable construction including a shank 22 that projects through the tool holder 10 and into the cylinder in thepath of movement of the piston 2. The valve plug 19 is formed with a stem 23 that projects outwardly. through f thetop of the casting 13 and is equipped with a handle 24 whereby the plu'g, may be actuated.A

In practice, when the valve plug is in the position shown in Fig. 3, air flows from the inlet pipe a17, through the passage 15 onto the upper'end of the piston, while the portion of the cylinder below the piston opens into the atmosphere through the pipe line 17 and exhaust pipe 18, thereby permitting the air onthe upper lend of the piston to force the latter downto strike the cutting tool 21. When the valve is changed to the position shown in Fig. 4, the inlet pipe 17 ism communication with' the pipe -line 1Q,

thereby permitting the' air to act on the under side of the piston and return the latter to the upper end cf. the cylinder, and the upper end of the cylinder opens into the atmosphere through the passage 15 and exhaust pipe 18. By thus manipulating the valve the piston may be reciprocated within the cylinder to strike the cutting tool so that the latter may'cut the rivets. Y

The cylinder 1, adjacent to the cutting tool 'end thereof, is preferably formed with ports 25 whereby the air acting on the under side of the piston" to return the latter to the upper end of the cylinder will be released in orderl to prevent the piston from. being driven into engagement with the casting 13.

-In the.1 present instance, the casting 13 is forined l:with diametrically opposed lugs 26' and passed through these lugs 26 and through' the flanges 6 and 8 are tie rods 27 that* act to hold the parts of the machine properly assembled In this form of my invention, I have shown the casting 7 'as equippedj with a handle 28 whereby the tool nipulatedl While I have hereinfsliown and described the'preferred form of'iny invention by way of illustration, I wish it to be understood' that` I do not limit or conne myself to the precise detalls of construction herein deend ofthe casing may bia-conveniently mas'cribed an'ddelineated, as `modiication and ,variation may be made within the scope of casting secured to one end of said cylinder, a

to'ol having the shank thereof' passed through said casting and projecting into the' lower end of the cylinder, a fluid-actuated pistonin said cylinder adapted to traverse the same and strike the shank of said tool to operate the latter, and aV yieldably supported tool holder mounted in said casting and normallyA bearing against the adjacent end of the cylinder and encircling said tool shank to takethe impact of the'piston in the event of the tool shank slipping out of the lower end of the cylinder.

2. A machine of the class described comprising an elongated cylinder, a cupshaped casting secured to one end of saidcylinder, a tool having the shank thereof passed through said casting and projecting into the lower end of the cylinder, a fluid-actuated piston in v s'aidfcylinder adapted to traverse the same and strike the shank of .said toolto operate' the latter, a sleeve-like tool holder mounted in said casting, and a spring surrounding said tool holder and fholding the latter normally in engagement with the adjacent end of the cylinder whereby said tool holder may take the impact of the piston and absorb the shock in the event of thei tool shank slipping out of thev lower end of the cylinder.

3.' A machine of the class described comprisingan elongated cylinder, a cup-shaped castingl'secured tojone end of Said cylinder, a tool having the shank thereof passed through said casting and projecting into the lower end of the cylinder, a fluid-actuated piston in said cylinder adapted to traverse the same and strike the shank of said tool to operate. the latter, a yieldably supported tool holder mounted in said casting and normally bearing against the adjacent end of' -the cylinder and encircling said tool shank to take the impact of the piston in the event of the tool shank slipping out of the lower end of the cylinder, and a controlling valve on the other end of said cylinder controlling the operation of sai'd piston. 'l 4. A machine of the class described comprising'an elongated cylinder, a cup-shaped casting secured to one end of said cylinder, a tool having the shank thereof passed through said casting and projecting into the lower end of the cylinder, a fluid-actuated piston in said cylinder adapted to traverse the same and strike the shank of said tool to operate the latter, a yieldably supportedtool holder mounted in said casting and normally bearing against the adjacent end shank to Atake the impact of the piston in lthe event of the tool shank slipping out of mosphere, and to establish communication the lower end of the cylinder, and a conbetween a source of supply and the lower trolling valve on the other end of said cylinend of the cylinder and connect the upper 1l der operable manually to establish oommuend of the cylinder to the atmosphere.

5 ncation between the source of supply and In testimony whereof 'I alix my signature. the upper end of the cylinder and to connect .the lower end of thecylinder with the at- JESSE E. ASH. 

